Lesson 6

Elapsed Time

Est. Class Sessions: 2

Daily Practice and Problems

Teacher Notes
X
  1. 18 = 10 + 8
  2. 10 + 5 = 15
  3. 9 + 7 = 16
  4. 15 = 6 + 9
  5. 10 + 6 = 16
  6. 17 = 9 + 8
  7. 10 + 7 = 17
  8. 9 + 5 = 14
  1. Answers will vary. One possible response: 8 + 8 = 16, so 9 + 8 is one more, or 17.

Ongoing Assessment

Use DPP item U to assess students’ fluency with the addition facts in Group F [E12].

U. Addition Facts Quiz: Group F

  1. = 10 + 8
  2. 10 + 5 =
  3. 9 + 7 =
  4. = 6 + 9
  5. 10 + 6 =
  6. = 9 + 8
  7. 10 + 7 =
  8. 9 + 5 =
  1. Show or tell how you solved Question F.